add stat master

stats.go

+package zdb
+
+import (
+	"time"
+)
+
+type Stat struct {
+	Id   string
+	Mode connMode
+	Host string
+	Port uint16
+
+	AcquireCount            int64
+	AcquireDuration         time.Duration
+	AcquiredConns           int32
+	CanceledAcquireCount    int64
+	ConstructingConns       int32
+	EmptyAcquireCount       int64
+	IdleConns               int32
+	MaxConns                int32
+	TotalConns              int32
+	NewConnsCount           int64
+	MaxLifetimeDestroyCount int64
+	MaxIdleDestroyCount     int64
+}
+
+func (d *Pool) StatMaster() *Stat {
+	return d.stat(d.srvMaster)
+}
+
+func (d *Pool) stat(q *conn) *Stat {
+	return &Stat{
+		Id:                      q.ToString(),
+		Mode:                    q.Mode,
+		Host:                    q.Config().ConnConfig.Host,
+		Port:                    q.Config().ConnConfig.Port,
+		AcquireCount:            q.Stat().AcquireCount(),
+		AcquireDuration:         q.Stat().AcquireDuration(),
+		AcquiredConns:           q.Stat().AcquiredConns(),
+		CanceledAcquireCount:    q.Stat().CanceledAcquireCount(),
+		ConstructingConns:       q.Stat().ConstructingConns(),
+		EmptyAcquireCount:       q.Stat().EmptyAcquireCount(),
+		IdleConns:               q.Stat().IdleConns(),
+		MaxConns:                q.Stat().MaxConns(),
+		TotalConns:              q.Stat().TotalConns(),
+		NewConnsCount:           q.Stat().NewConnsCount(),
+		MaxLifetimeDestroyCount: q.Stat().MaxLifetimeDestroyCount(),
+		MaxIdleDestroyCount:     q.Stat().MaxIdleDestroyCount(),
+	}
+}